Результаты (
украинский) 1:
[копия]Скопировано!
Vitamins are special organic substances which are indispensable for the organism. They do not provide energy and are not plastic materiels, but they participate in metabolism as catalysts. They are necessary for the formation of tissue enzymes which influence the transformation of substances in the cells and tissues of the organism.N. Lunin, a Russian doctor, was the first to establish (in 1880) the presence of these substances (later named vitamins) in the food.About 20 vitamins are known today. They are marked by letters A, B, C, D, E, K, P, etc. The chemical composition and physiological role of most vitamins have already been determined. Some vitamins are water soluble (B and C) are water soluble , while others (A, E, K) are soluble only in fats. The daily requirements of vitamins is measured in milligrams and even parts of a milligram.Fresh varied food usually contains enough vitamins for the organism.Vitamin A is found in green plants and is necessary for the proper growth of bones, for the nutrition of the eye cornea and for the proper functioning of night vision.19:16:14 Vitamin B is really a complicated group of vitamins, twelve of which have now been identified. Some of these are necessary for growth, proper functioning of the nervous system, the proper formation of erythrocytes.Vitamin C is the vitamin which prevents scurvy and is found in fresh vegetables and in citrus fruits.Вітамін D запобігає рахіт, Дефіцит вітаміну Е, можуть призвести до безпліддя.Тривалий дефіцит будь-який вітамін призводить до захворювання, відомого як авітамінозі. Більшість avitaminoses супроводжуються зниженою опірності організму до інфекції, неправильні розвитку та відсталих росту у дітей.Вітаміни широко використовуються в медичних цілях, багато хто з них вироблено синтетично.
переводится, пожалуйста, подождите..